Bakfiets Style Cargo Bike Box

I was lucky enough to get my hands on an used Bakfiets-style two-wheel cargo bike from a craigslist ad, but the previous owner had used it as a courier bike and had a flat platform instead of the usual big bucket box. I wanted the bike to go on rides with my 2-year-old son in the bucket box, so I had to build my own.

The box is mostly built from a sheet of 1/2" sanded plywood, with 1x2" red oak braces at all of the corners. The plans I'm posting aren't totally complete, they're mostly for sha